 /*******************************************************************************
  * Copyright (c) 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.core.internal.databinding.conversion;

 import org.eclipse.core.databinding.conversion.Converter;

 import com.ibm.icu.text.NumberFormat;

 /**
  * Converts a value that is an integer, non decimal, to a String using a
  * NumberFormat.
  * <p>
  * This class is a temporary as this ability exists in NumberToStringConverter
  * except that short and byte are missing.
  * </p>
  *
  * @since 1.0
  */
 public class IntegerToStringConverter extends Converter {
     private final boolean primitive;
     private final NumberFormat numberFormat;
     private final Class boxedType;

     /**
      * @param numberFormat
      * @param fromType
      * @param boxedType
      */
     private IntegerToStringConverter(NumberFormat numberFormat, Class fromType,
             Class boxedType) {
         super(fromType, String .class);
         this.primitive = fromType.isPrimitive();
         this.numberFormat = numberFormat;
         this.boxedType = boxedType;
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.core.databinding.conversion.IConverter#convert(java.lang.Object)
      */
     public Object convert(Object fromObject) {
         // Null is allowed when the type is not primitve.
 if (fromObject == null && !primitive) {
             return ""; //$NON-NLS-1$
 }

         if (!boxedType.isInstance(fromObject)) {
             throw new IllegalArgumentException (
                     "'fromObject' is not of type [" + boxedType + "]."); //$NON-NLS-1$//$NON-NLS-2$
 }

         return numberFormat.format(((Number ) fromObject).longValue());
     }

     /**
      * @param primitive
      * @return converter
      */
     public static IntegerToStringConverter fromShort(boolean primitive) {
         return fromShort(NumberFormat.getIntegerInstance(), primitive);
     }

     /**
      * @param numberFormat
      * @param primitive
      * @return converter
      */
     public static IntegerToStringConverter fromShort(NumberFormat numberFormat,
             boolean primitive) {
         return new IntegerToStringConverter(numberFormat,
                 primitive ? Short.TYPE : Short .class, Short .class);
     }

     /**
      * @param primitive
      * @return converter
      */
     public static IntegerToStringConverter fromByte(boolean primitive) {
         return fromByte(NumberFormat.getIntegerInstance(), primitive);
     }

     /**
      * @param numberFormat
      * @param primitive
      * @return converter
      */
     public static IntegerToStringConverter fromByte(NumberFormat numberFormat,
             boolean primitive) {
         return new IntegerToStringConverter(numberFormat, primitive ? Byte.TYPE
                 : Byte .class, Byte .class);
     }
 }

